FlightTaskOrbit: reset reached when new parameters are set

such that they get applied to the straight line trajectory class
and the drone starts approaching the new orbit.

src/lib/flight_tasks/tasks/Orbit/FlightTaskOrbit.cpp

@@ -97,6 +97,7 @@ bool FlightTaskOrbit::applyCommandParameters(const vehicle_command_s &command)
 
 	// perpendicularly approach the orbit circle again when new parameters get commanded
 	_in_circle_approach = true;
+	_circle_approach_line.reset();
 
 	return ret;
 }